package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.awt.*;
import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartSrviceImpl implements ShoppingCartService  {
    @Autowired
    private ShoppingCartMapper  shoppingCartMapper ;
    @Autowired
    private DishMapper dishMapper ;
    @Autowired
    private SetmealMapper  setmealMapper ;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO ){
        //判断当前加入购物车的数据是否已经存在了
        //select * from shopping_cart where user_id=? and setmeal_id=xx
        ShoppingCart shoppingCart =new ShoppingCart();
        BeanUtils .copyProperties(shoppingCartDTO ,shoppingCart );
        Long id=BaseContext .getCurrentId() ;
        shoppingCart .setUserId(id);

        List<ShoppingCart> list=shoppingCartMapper .list(shoppingCart );
        //如果存在，只需要将数据量加一
        if(list!=null&&list.size() >0){
            ShoppingCart shoppingCart1 =list.get(0);
            shoppingCart1 .setNumber(shoppingCart1 .getNumber() +1);
            //update shopping_cart set number
            shoppingCartMapper .updateNumberById(shoppingCart1 ) ;
        }else{
            //如果不存在，需要插入一条购物车数据
            Long dishId=shoppingCartDTO .getDishId();
            if(dishId!=null ){
                //添加到购物车的是菜品
                Dish dish=dishMapper .getById(dishId );
                shoppingCart .setName(dish.getName());
                shoppingCart .setImage(dish.getImage());
                shoppingCart .setAmount(dish.getPrice() );
            }else{
                Long setmealId=shoppingCartDTO .getSetmealId() ;
                //本次添加到购物车的是套餐
               Setmeal  setmeal =setmealMapper .getById(setmealId );
                shoppingCart .setName(setmeal.getName());
                shoppingCart .setImage(setmeal.getImage());
                shoppingCart .setAmount(setmeal.getPrice() );
            }
            shoppingCart .setCreateTime(LocalDateTime .now());
            shoppingCart .setNumber(1);
            shoppingCartMapper .insert(shoppingCart );
        }

    }
    /**
     * 查看购物车
     * @return
     */
    public List<ShoppingCart> showServiceCart(){
        //获取到当前微信用户的id
        Long id=BaseContext .getCurrentId() ;
        ShoppingCart  shoppingCart =ShoppingCart .builder()
                        .userId(id)
                                .build() ;
       List<ShoppingCart >shoppingCartList =shoppingCartMapper .list(shoppingCart) ;
        return shoppingCartList;
    }
    /**
     * 清空购物车
     */
   public void cleanShoppingCart(){
       //获取当前微信用户的id
       Long userId=BaseContext .getCurrentId() ;
       shoppingCartMapper .deleteByUserId(userId );
   }
    /**
     * 删除购物车中一个商品
     * @param shoppingCartDTO
     */
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //设置查询条件，查询当前登录用户的购物车数据
        shoppingCart.setUserId(BaseContext.getCurrentId());

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list != null && list.size() > 0){
            shoppingCart = list.get(0);

            Integer number = shoppingCart.getNumber();
            if(number == 1){
                //当前商品在购物车中的份数为1，直接删除当前记录
                shoppingCartMapper.deleteById(shoppingCart.getId());
            }else {
                //当前商品在购物车中的份数不为1，修改份数即可
                shoppingCart.setNumber(shoppingCart.getNumber() - 1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            }
        }
    }
}
